Company wants us back in office full time, I'm considering leaving. Overreacting?

Not unreasonable at all, 3 hours of daily commute is 15 hours a week of unpaid life, that's a real pay cut in time. But don't quit on emotion, negotiate first. Steps that worked for my team: ask for a formal flexible work arrangement request (there's now a national set of guidelines requiring employers to properly consider such requests, so you have standing to ask in writing). Propose a specific reasonable middle ground, like 3 days in office, and back it with your productivity track record over the last 3 years. Frame it around output and retention, not your preference. If they flat out refuse everything, then yes, factor the commute into your next move and job-hunt calmly while employed. Also weigh the whole package, if the pay and growth are great, maybe you move closer or find carpool/express bus options. But if it's a mediocre job AND a brutal commute AND rigid management, that's three strikes, leaving is rational, not dramatic.